# One entry in a list of maps.

# Naming a map is optional.
string name

# Maps made by the make-a-map app are given a session ID, which is the
# time when the map-making session was started, expressed as seconds
# since the epoch and converted to a string.
string session_id

# Creation time of this map, in seconds since the epoch.
int64 date

# Unique ID of this map.
string map_id
